1997 Cadillac Eldorado BaseFACTORY OEM SERVICE PROCEDURE

Sending Units & Sensors

SENDING UNITS & SENSORS

Component Component Location
A/C High Side Temperature Sensor On center of firewall, on A/C high side line.
A/C Low Side Temperature Sensor On right side of firewall, on A/C line at evaporator inlet.
A/T Fluid Temperature Sensor In transaxle valve body.
A/T Input Shaft Speed Sensor In transaxle valve body.
Brake Booster Vacuum Sensor On brake booster.
Camshaft Position (CMP) Sensor On right rear corner of engine, on cam carrier.
Catalytic Converter Over Temperature Sensor On exhaust pipe, after catalytic converter.
Crankshaft Position (CKP) Sensors On front center engine block, near oil dipstick.
Electronic Level Control (ELC) Height Sensor On rear suspension support.
Engine Coolant Temperature (ECT) Sensor Left rear of engine, near base of rear engine lift hook.
Forward/Back Position Sensors Under respective front seat, fastened to seat adjuster frame.
Forward Discriminating Sensor On right center of radiator support, above cooling fan.
Heated Oxygen Sensors (HO2S) (Converter) (2) In exhaust system, before & after catalytic converter.
Heated Oxygen Sensors (HO2S) (Engine) (2) On exhaust manifolds, both sides of engine.
Height Position Sensors (Front & Rear) Under respective front seat, fastened to seat adjuster frame.
In-Car Temperature Sensor On top center of dash, behind A/C vent.
Intake Air Temperature (IAT) Sensor On top left side of engine, on engine air cleaner assembly.
Knock Sensor (KS) On center of engine, below intake manifold.
Lumbar Position Sensors (4) In respective front seat, fastened to seat back frame.
Manifold Absolute Pressure (MAP) Sensor Top left front of engine, right of throttle body.
Mass Air Flow (MAF) Sensor On air inlet of throttle body. See Figure .
Outside Air Temperature Sensor On center of upper radiator support.
Recliner Position Sensors (2) Under respective front seat, on seat adjuster frame.
Rotary Combination Sensors In respective wheelhouse, near lower control arm.
Steering Wheel Position Sensor Under left side of dash, at base of steering column.
Sun Load Sensor On top center of dash, near defroster grille.
Throttle Position (TP) Sensor On throttle body assembly. See Figure .
Vehicle Speed Sensor (VSS) Lower right rear of engine, on transaxle.
Wheel Speed Sensors Behind respective wheel hub.
Windshield Washer Fluid Level Sensor Forward of left front wheelwell, behind front fascia.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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